Home / 7,421.29-11,139.22-5,649.82

Finding the Fourth Proportional to 7,421.29, 11,139.22 and 5,649.82

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Solution

The fourth proportional to 7,421.29, 11,139.22 and 5,649.82 is: 8,480.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,421.29 : 11,139.22 = 5,649.82 : x
  2. Step 2: Convert to fraction form
    7,421.29/11,139.22 = 5,649.82/x
  3. Step 3: Cross multiply
    7,421.29x = 11,139.22 × 5,649.82
  4. Step 4: Simplify right side
    7,421.29x = 62,934,567.15
  5. Step 5: Solve for x
    x = 62,934,567.15/7,421.29
  6. Step 6: Final answer
    x = 8,480.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.